The City of Roseville’s groundwater management program is designed to diversify our water supplies by adding ground water as an additional source to existing surface water supplies; the majority of which comes from lake Folsom.
Our ASR wells enable us to inject an excess of surface water, once treated by our water treatment plant, down into the underground aquifer at the well sites. During times of year, and years where there is a shortage of surface water—such as a drought—we will be able to pump water out of the aquifer at the well sites to meet water demands of the City.
Traffic: During the construction period expect additional traffic around the site as workers arrive, when materials are delivered, and as facilities are constructed and installed.
Noise: Significant noise is expected only during drilling of the wells which can take up to two weeks and is a continuous, 24/7 operation. Once the wells are drilled, Moderate construction noise can be expected between 7 a.m. and 7 p.m. on weekdays. This will include earth moving equipment, concrete placement, and general construction activities.
Safety: Sidewalks may be closed around the construction site and marked with signs. Traffic control plans are prepared and submitted by the construction contractor. These plans are reviewed by the City’s Public Works for approval before implementation.
Construction sites will have temporary fencing installed to safeguard the public from hazardous conditions when construction workers are not present and to protect stockpiles of materials and equipment.
The City expects to pump water mainly during summer, with occasional year-round pumping for well maintenance. Recharge—injecting water into the aquifer—will mostly happen in winter when excess surface water is available.
Wells will run in production, recharge, or maintenance mode based on water demand and availability. Both pumping and recharge may occur 24/7 if needed.
Routine maintenance includes periodic flushing and filter backwashing. Flushing will take place during the day, while backwashing is automated. All discharges will be managed through onsite storm drains or sanitary sewers.
We conducted an environmental noise assessment for the Solaire and Westbrook well sites to ensure that the projects would not exceed the City of Roseville’s noise level standards at the adjacent sensitive receptors.
Filter tanks (not used at all well sites): The acoustics study included a visit to another City where the same filter vessels were in use. It was found that there was no audible noise coming from the filtration tanks when in normal operation. When the tanks are backwashed water will be discharged through an air gap to the flow equalization tank and trickled into the sanitary sewer system. Other than the sound of running water during backwash, no sound is expected from the filters.
Well Pumps: The pumps may generate noticeable noise, so the buildings were designed with sound mitigation in mind. They feature 12-inch filled concrete masonry walls—similar to sound walls—along with sound-absorbing roof materials. Doors and overhead coiling assemblies are acoustically insulated, and low-noise ventilation louvers are positioned to face away from nearby homes whenever possible.
Air Conditioning: Air conditioning is required in each of the pump buildings for the electrical equipment. Location of the exterior compressor component of the air conditioning system was determined by the sound study to direct sounds away from residents. A Variable Refrigerant Flow (VRF) system was installed to reduce ambient noise both inside the building as well as outside in comparison to traditional HVAC technology.
Each well site is designed with security measures including motion-activated cameras, yard lighting, no-climb gates, and interior and exterior signs with emergency contact phone numbers.
Water distribution system operators will visit the well facilities several times each week for operational checks, water sampling, and periodic maintenance. Deliveries of supplies may occur a couple of times per month.
The City typically selects trees and shrubs must block views, provide ornamental benefits, and increase sound buffers.
Outside of the perimeter walls the plants will often follow the landscape design or design standards that was installed by the subdivision’s developer or stipulated in the specific community’s design guidelines barring other neighborhood input.
Landscape plants and irrigation will be maintained by a dedicated contract to the City’s Environmental Utilities.